This method is ONLY recomended to those investors who have advanced degrees in trans-formational,diametric,mummification,studies, with a minor in gift wrapping of cadavers..
http://en.wikipedia.org/wiki/Brownian_model_of_financial_markets
OR throw darts at a specially formatted BOARD..
As a possible third alternative.there is always the use of a ouiga board...
Have fun..